Verhelle Adriaan, Saremi Behnam
Poulpharm BV, Prins-Albertlaan 112, 8870 Izegem, Belgium.
CJ Europe GmbH, Amino Acid Application Center, Unterschweinstiege 2-14, 60549 Frankfurt am Main, Germany.
Animals (Basel). 2024 Dec 24;15(1):4. doi: 10.3390/ani15010004.
Two 35-day trials were conducted to determine the arginine (Arg) requirement of broiler chickens and the Arg and energy-sparing effects of guanidinoacetic acid (GAA). In experiment 1, a low-Arg diet (basal diet) was supplemented with increasing levels (0.06-0.61%) of L-Arg or GAA. In experiment 2, a diet meeting the energy and amino acid requirements of broiler chickens served as the positive control (PC). Two negative control (NC) groups were assigned by reducing either 50 (NC1) or 100 (NC2) kcal nitrogen-corrected metabolizable energy. Test groups were supplemented with 0.06% GAA for NC1 and 0.12% GAA for NC2 to compensate for the lower energy in the feed. The low dietary Arg concentration (starter: 1.02%, grower: 0.88%, finisher: 0.75%) significantly reduced overall performance ( < 0.05). Supplementation of either L-Arg or GAA with a low-Arg diet both alleviated the lower performance ( < 0.05). However, more GAA was needed to provide the same level of growth attained with L-Arg at an equivalency rate of 1 GAA to 0.57 Arg. Reduction of dietary energy by 50 and 100 kcal did not significantly influence the performance of birds at all stages of growth. Moreover, no effect of GAA supplementation at 0.06% or 0.12% was observed.
进行了两项为期35天的试验，以确定肉鸡的精氨酸（Arg）需求量以及胍基乙酸（GAA）的精氨酸和能量节约效应。在实验1中，低精氨酸日粮（基础日粮）补充了不同水平（0.06 - 0.61%）的L - 精氨酸或GAA。在实验2中，满足肉鸡能量和氨基酸需求的日粮用作阳性对照（PC）。通过减少50（NC1）或100（NC2）千卡氮校正代谢能来设置两个阴性对照（NC）组。试验组分别为NC1补充0.06% GAA，为NC2补充0.12% GAA，以补偿饲料中较低的能量。低日粮精氨酸浓度（开食期：1.02%，生长肥育期：0.88%，育肥期：0.75%）显著降低了整体性能（P<0.05）。低精氨酸日粮补充L - 精氨酸或GAA均可缓解性能下降（P<0.05）。然而，以1 GAA相当于0.57 Arg的等效率，需要更多的GAA才能达到与L - 精氨酸相同的生长水平。日粮能量分别减少50和100千卡对肉鸡各生长阶段的性能均无显著影响。此外，未观察到补充0.06%或0.12% GAA的效果。
